Code Alert! This is a part of our continuing series on Engineering at LinkedIn. If this isn’t your cup of Java, check back tomorrow for regular LinkedIn programming. In the meanwhile, check out some of our latest product features, tips and tricks, or user stories. – Ed. We launched a new version of the LinkedIn Polls application towards the end of last year. The new version was a major overhaul from a usability standpoint, making it easier to vote, share, and interact with a poll…